]] He fancied himself as inspiring Marianne to die for love.

] I knew exactly how she would appear to those who saw her last in this world."

] he now wants to kick the dose up another notch by watching his "beloved" Marianne die!

It's a sickening thought, but I agree that there is more than a hint of this going on.

One of Willoughby's favourite pastimes is hunting. Throughout the story, we have mention of him hunting, his horses and dogs, Sir John's high opinion of him in this regard, his hunting jacket, etc.

My impression of this was that Marianne's death, the death of a beautiful girl whose sweet white face he could picture, and who had died for love of him, would almost have been like a 'trophy' (ugh!) to him in a way. He could not have her himself, but there was glory in the idea that he was her one and only great love, and no one else would have her either!